at home I have following DSL-modem, broadcasting wi-fi for clients:DSL-EasyBox 802 (by Vodafone)

Since the signal at the other end of the house is quite weak, I want to extend the network with following Access point:Dwl g700AP (by Dlink)

There are two possibilities:
- wired: connecting Lan-port of Easybox to Wan-port of DWL (which does not have lan ports)
- wireless / WDS: receiving all signals wirelessly, known as a Wireless Distribution System

I should know enough to set this up, but it doesn't seem to work, in both cases. I could use some help/advice, most of all in regards of the IP-adresses, since I guess that I have a mistake there somewhere.

These settings do not work, when I put a cable between the two devices. Nor do they work without cable. I have already tried a lot of things, given up several times, but tried again since the signal is really weak. So, I guess the problem is the IP-adresses and such (gateways,...)

So, here are some questions:
- should I use same SSID?
- should I use same channel?
- should I enable WDS on Easybox and enter mac-adress of DWL? I can scan with Easybox for other broadcasting devices in the same channel...
- should the DWL also be a DHCP-server? If so, can it be the same range like the Easybox?
- should the DWL have a static ip, for example 192.168.2.199? If so, gateway 192.168.2.1?
- should I change the mode on the DWL to "repeater"? I can scan for networks to repeate...
- should I give the client a static IP, for example 192.168.2.100? If so, should I use gateway 192.168.2.1 or the IP-adress of the DWL, in the last case 192.168.2.199?

I know, a lot of the questions are quite trivial, but since I can't find the problem, I better ask all questions. Also, the configuration that has been described is one of the many that I have tried...